package service.impl;

import dao.SysUserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import pojo.SysUser;
import service.SysUserService;

import java.util.List;

@Transactional
@Service("sysUserService")//注册为一个Service层的Bean
public class SysUserServiceImpl implements SysUserService {

    @Autowired//@Resource//使用注解的方式将DAO层的Bean注入
    private SysUserMapper sysUserMapper;

    @Transactional(propagation = Propagation.SUPPORTS)
    @Override
    public List<SysUser> getList(SysUser sysUser) {
        try{
            return sysUserMapper.selectSysUserList(sysUser);
        }catch (RuntimeException e){
            e.printStackTrace();
            throw e;
        }

    }

    /**
     * 保存用户
     * @param sysUser
     * @return
     */
    @Transactional(propagation = Propagation.REQUIRED)
    @Override
    public boolean add(SysUser sysUser) {
//        sysUserMapper.add(sysUser);
        // 模拟在一个事务中两次对数据库的操作，第一次操作完成之后发生异常时，第二次未操作未执行，第一次操作也将回滚。两次操作要么都不成功，要么同时成功
//        sysUserMapper.add(sysUser);
//        int num = 5 / 0; // 模拟程序中抛出异常
        // if (sysUser != null) {
        // 手动抛出异常
        // throw new SendEMailException("发送通知邮件异常");
        // }
        sysUserMapper.add(sysUser);
        return true;
    }

    public SysUserMapper getSysUserMapper(){
        return sysUserMapper;
    }


    public void setSysUserMapper(SysUserMapper sysUserMapper) {
        this.sysUserMapper = sysUserMapper;
    }
}
